MICHIGAN CITY -- A man was sentenced Thursday for a bungled robbery attempt at a rest stop along Interstate 94 with a toy gun. Geoffery Plunk, 18, of Trail Creek, received a six-year prison sentence under a plea agreement in LaPorte Superior Court 1 for Class B felony carjacking. Early on June 24, Plunk was among four teenagers who walked to the rest stop near Michigan City after a 1991 Ford Escort they stole broke down, according to police. While one of the suspects went inside the rest stop building to look for a vending machine, the three others approached a man, demanding his car. According to police, the youngest of the suspects, who was then 14, displayed a plastic cigarette lighter shaped like a handgun. The juvenile then hit the man in the face with the fist clutching the toy firearm, police said. They jumped into the car but quickly bailed out upon discovering the car had a manual transmission. None of the boys knew how to operate a stick shift, police said. All four of the suspects were located well before sunrise during a search with tracking dogs. Two of the suspects were charged as juveniles. The other suspect, 18-year-old Rickey Bentley of Michigan City, who's charged with Class B felony carjacking in the same court, is still awaiting trial.